As well, noted on the base of far right projectile is a mass or gob of the base metal of the projectile body. Both of mine have a conical, apparently drilled, depression in the approximate center of the gob. It almost looks like a sprue stub or something. Very corroded, but evident on both of my fired and unfired projectiles. Would think that would affect the trajectory and/or flight path to some extent. But maybe it’s small enough to be out of the airflow. Guess I’ll build a wind tunnel and see. Will update when complete;-)